NbAl intelligent material through mechanical alloying and spark plasma sintering

Karuna Chinniah, Yan Sheng Kang, Akira Kawasaki

Research output: Chapter in Book/Report/Conference proceedingConference contribution


An intelligent material Nb-Al, expected to produce intermetallics phase instantaneously to stop crack development upon collision with sub-centimeter sized hypervelocity space debris, is researched. Intermetallics-free Nb-Al powders are produced through mechanical alloying (MA) and densification achieved through spark plasma sintering. Nb-Al powders are mechanically alloyed using planetary ball mill using agate and zirconia pot. Rotation speed and milling time is changed systematically to form intermetallics-free critical MA powder. A state of ultra fine intermetallics-free Nb-Al powder is produced. Intermetallics-free MA powder with fine Nb in Al matrix with most minute average particle size is utilized and sintering was carried out in vacuum with axial pressure increased up to 1.5GPa. The sintered compacts are then subjected to test such as XRD profiling, FE-SEM observation and mechanical properties testing such as hardness, etc.

Original languageEnglish
Title of host publicationEuro PM 2005
Subtitle of host publicationPowder Metallurgy Congress and Exhibition
PublisherEuropean Powder Metallurgy Association (EPMA)
Number of pages6
ISBN (Print)9781899072187
Publication statusPublished - 2005 Jan 1
EventEuropean Powder Metallurgy Congress and Exhibition, Euro PM 2005 - Prague, Czech Republic
Duration: 2005 Oct 22005 Oct 5

Publication series

NameEuro PM 2005: Powder Metallurgy Congress and Exhibition


OtherEuropean Powder Metallurgy Congress and Exhibition, Euro PM 2005
Country/TerritoryCzech Republic

ASJC Scopus subject areas

  • Mechanics of Materials
  • Ceramics and Composites
  • Materials Chemistry
  • Metals and Alloys
  • Condensed Matter Physics


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